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Introduction

Sometimes you uninstall an AV from your system but once you try to install a new one, it says there is a previous one already installed... but you can't find it under Programs or Add and Remove Programs... what to do?

Steps
(9 total)

1

Run wbemtest from command prompt

2

click on connect

3

namespace: root\securitycenter2

(from Vista and up... or securitycenter on XP)

4

click on Open Class

5

type AntiVirusProduct and press OK

6

Click on Instances

7

Select the instance

each instance found corresponds to an AV installed, if you don't want any AV at all, delete all instances... or delete just the one you don't want... check step below

8

Display Name

you can also double click on each instance, scroll down to find its Display Name and choose if that is an instance you want to delete... The display name will display the friendly AV name

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